Posted Facilities; Potentially Explosive Environments - Zte A712+ User Manual

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RF signals may affect improperly installed or inadequately shielded electronic
systems in motor vehicles. Check with the manufacturer or its representative
regarding your vehicle.
You should also consult the manufacturer of any equipment that has been added to
your vehicle.

Posted facilities

Switch off your phone in any facility where posted notices require you to do so.

Potentially explosive environments

Switch off your phone when in any area with a potentially explosive atmosphere,
and obey all signs and instructions to turn off mobile phones and other radio
equipment. Sparks in such areas could cause an explosion or fire resulting in
bodily injury or even death.
Users are advised to switch off the phone while at a refuelling point (service
station). Users must observe restrictions on the use of radio equipment in fuel
depots (fuel storage and distribution areas), chemical plants, or where blasting
operations are in progress.
Areas with a potentially explosive atmosphere are often but not always clearly
marked. They include the areas below decks on boats, chemical transfer or storage
facilities, vehicles using liquefied petroleum gas, such as propane or butane, areas
where the air contains chemicals or particles, such as grain, dust or metal powders,
and any other area where you would normally be advised to turn off your vehicle
engine.